by Mike Krumboltz Gay marriage continues to be a hot-button issue for many Americans. Whenever it's legalized (or banned) anywhere in the world, searches immediately soar. In Washington, D.C., gay marriage was recently legalized, sparking tremendous Web interest. A lesbian couple who had been together for 12 years became the first same-sex couple to be married in the nation's capital. With the couple's union, Washington, D.C. joined New Hampshire, Vermont, Iowa, Massachusetts,